How Do I Replace or Clean the audio jack?

Athena try the "air in a can" from your local department or electronic store. you can of course try any other compressed air to blow it out. I would stay away from sticking anything in there. If you need to replace the jack itself, it does get a little trickier. The jack is solder to the logic board. So unless you have a spare and someone who can do that type of soldering, you may have to replace the board. Here are the instruction Sustitución de la Placa Lógica del iPod Touch 1ª Generación and good luck to you. Oh yeah, try a different set of headphones to just to make sure it is the jack.